package com.weixin.util;

import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSocketFactory;
import javax.net.ssl.TrustManager;
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.ConnectException;
import java.net.URL;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;
import java.util.Date;
import java.util.Random;

import com.agent.util.Constants;
import com.weixin.pojo.AccessToken;
import net.sf.json.JSONException;
import net.sf.json.JSONObject;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.util.StringUtils;

public class WXUtil {

    private static Logger log = LoggerFactory.getLogger(WXUtil.class);

    public static String gengertorId(){
        LocalDateTime today = LocalDateTime.now();
        DateTimeFormatter formatters = DateTimeFormatter.ofPattern("yyyyMMdd-HHmmss-SSS");
        return today.format(formatters);
    }

    public static String gengertorBillno(){
        LocalDateTime today = LocalDateTime.now();
        DateTimeFormatter formatters = DateTimeFormatter.ofPattern("yyyyMMddHHmmss-SSS");
        return today.format(formatters);
    }
    // 1-10元  由于单位为分  即 100-1000直接的随机数
    public static int gengertorAmount(){
        Random random = new Random();
        return random.nextInt(900)+100;
    }

    /**
     * 1.发起https请求并获取结果
     *
     * @param requestUrl 请求地址
     * @param requestMethod 请求方式（GET、POST）
     * @param outputStr 提交的数据
     * @return JSONObject(通过JSONObject.get(key)的方式获取json对象的属性值)
     */
    public static JSONObject httpRequest(String requestUrl, String requestMethod, String outputStr) {
        log.info("com.weixin.util.WXUtil.httpRequest url is {}",requestUrl);
        JSONObject jsonObject = null;
        StringBuffer buffer = new StringBuffer();
        try {
            // 创建SSLContext对象，并使用我们指定的信任管理器初始化
            TrustManager[] tm = { new MyX509TrustManager() };
//            SSLContext sslContext = SSLContext.getInstance("SSL", "SunJSSE");
            SSLContext sslContext = SSLContext.getInstance("TLSv1.2");
            //设置https协议访问
//            System.setProperty("https.protocols", "TLSv1,TLSv1.1,TLSv1.2,SSLv3");
            sslContext.init(null, tm, new java.security.SecureRandom());
            // 从上述SSLContext对象中得到SSLSocketFactory对象
            SSLSocketFactory ssf = sslContext.getSocketFactory();

            URL url = new URL(requestUrl);
            HttpsURLConnection httpUrlConn = (HttpsURLConnection) url.openConnection();
            httpUrlConn.setSSLSocketFactory(ssf);
            httpUrlConn.setConnectTimeout(10*1000);
            httpUrlConn.setReadTimeout(30*1000);
            httpUrlConn.setDoOutput(true);
            httpUrlConn.setDoInput(true);
            httpUrlConn.setUseCaches(false);
            // 设置请求方式（GET/POST）
            httpUrlConn.setRequestMethod(requestMethod);

            if ("GET".equalsIgnoreCase(requestMethod))
                httpUrlConn.connect();

            // 当有数据需要提交时
            if (null != outputStr) {
                OutputStream outputStream = httpUrlConn.getOutputStream();
                // 注意编码格式，防止中文乱码
                outputStream.write(outputStr.getBytes("UTF-8"));
                outputStream.close();
            }

            // 将返回的输入流转换成字符串
            InputStream inputStream = httpUrlConn.getInputStream();
            InputStreamReader inputStreamReader = new InputStreamReader(inputStream, "UTF-8");
            BufferedReader bufferedReader = new BufferedReader(inputStreamReader);

            String str = null;
            while ((str = bufferedReader.readLine()) != null) {
                buffer.append(str);
            }
            bufferedReader.close();
            inputStreamReader.close();
            // 释放资源
            inputStream.close();
            inputStream = null;
            httpUrlConn.disconnect();
            jsonObject = JSONObject.fromObject(buffer.toString());
        } catch (ConnectException ce) {
            log.error("Weixin server connection timed out.");
        } catch (Exception e) {
            log.error("https request error:{}", e);
        }
        log.info("com.weixin.util.WXUtil.httpRequest jsonObject is {}",jsonObject);
        return jsonObject;
    }


    public static synchronized String getToken(String appid, String appsecret){
        if(!StringUtils.isEmpty(appid) && !StringUtils.isEmpty(appsecret)){
            if(Constants.tokenMap.containsKey(appsecret)){
                AccessToken accessToken = Constants.tokenMap.get(appsecret);
                log.info("accessToken is {} ",accessToken.toString());
                if(accessToken.getExpiresTime() - System.currentTimeMillis()>1000*60){
                    return accessToken.getToken();
                }
                log.info("the token is expire token is {}, appsecret is {} removed ...",accessToken.getToken(),appsecret);
                Constants.tokenMap.remove(appsecret);
            }
            AccessToken accessToken = getAccessToken(appid, appsecret,0);
            if(null !=accessToken){
                Constants.tokenMap.put(appsecret,accessToken);
                return accessToken.getToken();
            }
        }
        return "";
    }

   /* public static void main(String[] args) {
        Date date = new Date(1593316094540l);
        System.out.println(date);
    }*/
    /**
     * 3.获取access_token
     *
     * @param appid 凭证
     * @param appsecret 密钥
     * @return
     */
    public static AccessToken getAccessToken(String appid, String appsecret,int retryCount) {
        AccessToken accessToken = null;
        retryCount ++;
        if(retryCount == 3){
            log.info("getAccessToken error  retryCount is {}",retryCount);
            return null;
        }
        String requestUrl = WxepConstants.access_token_url.replace("{corpId}", appid).replace("{corpsecret}", appsecret);
        log.info("access_token_url is {} ",requestUrl);
        JSONObject jsonObject = httpRequest(requestUrl, "GET", null);
        log.info("jsonObject is {} " ,jsonObject);
        // 如果请求成功
        if (null != jsonObject) {
            try {
                accessToken = new AccessToken();
                accessToken.setToken(jsonObject.getString("access_token"));
                int expires_in = jsonObject.getInt("expires_in");
                long expireTime = System.currentTimeMillis()+expires_in*1000;
                accessToken.setExpiresTime(expireTime);
            } catch (JSONException e) {
                accessToken = null;
                // 获取token失败
                log.error("获取token失败 errcode:{} errmsg:{}", jsonObject.getInt("errcode"), jsonObject.getString("errmsg"));
            }
        }else{
            return getAccessToken(appid, appsecret, retryCount);
        }
        return accessToken;
    }
}
